Evolving end points for clinical trials in advanced colorectal cancer

2009 ◽  
Vol 5 (3) ◽  
pp. 135-139 ◽  
Author(s):  
Sharlene Gill ◽  
Daniel J. Sargent
Keyword(s):  
Colorectal Cancer ◽  
Clinical Trials ◽  
Advanced Colorectal Cancer ◽  
End Points

scholarly journals Evaluation of Continuous Tumor-Size–Based End Points as Surrogates for Overall Survival in Randomized Clinical Trials in Metastatic Colorectal Cancer

2019 ◽  
Vol 2 (9) ◽  
pp. e1911750
Author(s):  
Tomasz Burzykowski ◽  
Elisabeth Coart ◽  
Everardo D. Saad ◽  
Qian Shi ◽  
Dirkje W. Sommeijer ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Overall Survival ◽  
Clinical Trials ◽  
Metastatic Colorectal Cancer ◽  
Tumor Size ◽  
Randomized Clinical Trials ◽  
End Points

Target-based therapeutic matching in early-phase clinical trials in patients with advanced colorectal cancer and PIK3CA mutations.

2012 ◽  
Vol 30 (4_suppl) ◽  
pp. 459-459
Author(s):  
Filip Janku ◽  
Aung Naing ◽  
Gerald Steven Falchook ◽  
Apostolia Maria Tsimberidou ◽  
Vanda M. T. Stepanek ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Clinical Trials ◽  
Early Phase ◽  
Advanced Colorectal Cancer ◽  
Mtor Inhibitors ◽  
Mtor Pathway ◽  
Kras Mutations ◽  
Pik3ca Mutations ◽  
Molecular Abnormalities ◽  
Early Phase Clinical Trials

459 Background: Therapeutic matching based on underlying molecular abnormalities showed promising results in patients with diverse advanced cancers in early phase clinical trials. PIK3CA mutations may predict response to therapies with PI3K/AKT/mTOR inhibitors. Methods: Tumors from patients with colorectal cancer referred to the Clinical Center for Targeted Therapy (Phase I Program) were analyzed for PIK3CA mutations. Patients with PIK3CA mutations were treated, whenever feasible, with agents targeting the PI3K/AKT/mTOR pathway. Results: Of 194 patients analyzed, 31 (16%) had PIK3CA mutations. Of 194 patients 175 (90%) were assessed for the presence of KRAS mutation. Patients with PIK3CA mutations had higher prevalence of simultaneous KRAS mutations than patients with wild-type (wt) PIK3CA (21/30, 70% vs. 63/145, 43%; p=0.009). Of the 31 patients with PIK3CA mutations, 17 (55%) were treated in clinical trials containing a PI3K/AKT/mTOR pathway inhibitor (median age, 57; median number of prior therapies, 4). Of these 17 patients, none achieved a partial or complete response (PR/CR) and only 1 (6%, 95% CI 0.01-0.27) patient had stable disease for more than 6 months (SD>6), which was not significantly different from the SD>6/PR/CR rate of 16% (11/67; 95% CI 0.09-0.27) in colorectal cancer patients without PIK3CA mutations treated on the same protocols targeting the PI3K/AKT/mTOR pathway (p=0.44). The median progression-free survival was only 1.9 months (95% CI 1.5-2.3). Conclusions: Heavily pretreated patients with PIK3CA-mutant advanced colorectal cancer do not seem to benefit from protocols incorporating PI3K/AKT/mTOR inhibitors. PIK3CA mutations are associated with simultaneous KRAS mutations, which might account for therapeutic resistance.

Meta-analysis of randomized trials testing the biochemical modulation of fluorouracil by methotrexate in metastatic colorectal cancer. Advanced Colorectal Cancer Meta-Analysis Project.

1994 ◽  
Vol 12 (5) ◽  
pp. 960-969 ◽  
Keyword(s):  
Colorectal Cancer ◽  
Overall Survival ◽  
Clinical Trials ◽  
Regression Model ◽  
Randomized Clinical Trials ◽  
Tumor Response ◽  
Advanced Colorectal Cancer ◽  
Response Rate ◽  
Meta Analysis ◽  
Biochemical Modulation

PURPOSE Even though fluorouracil (5FU) remains the standard treatment of advanced colorectal cancer, almost 90% of patients treated with 5FU alone do not achieve an objective response to chemotherapy. Biochemical modulation of 5FU by methotrexate (MTX) is an attempt to increase the sensitivity of tumor cells to 5FU. However, despite the inclusion of several hundreds of patients in randomized clinical trials, no definitive evidence is available on the clinical benefit of 5FU/MTX over 5FU alone. A meta-analysis was performed to assess this benefit objectively and quantitatively for tumor response rate and overall survival. DESIGN The meta-analysis was based on individual data of 1,178 patients included in eight randomized clinical trials comparing 5FU alone with 5FU/MTX. Patient data were provided by all principal investigators. The analyses were performed by an independent secretariat, and then discussed with all collaborators. RESULTS Tumor response rate was 10% for patients allocated to 5FU alone (complete response [CR] rate, 2%; partial response [PR] rate, 8%) compared with 19% for patients allocated to 5FU/MTX (CR rate, 3%; PR rate, 16%). This difference was highly significant, with an overall response odds ratio (OR) of 0.51 (95% confidence interval [CI], 0.37 to 0.70) (P < .0001). Median overall survival times were 9.1 months and 10.7 months in the 5FU-alone and 5FU/MTX groups, respectively. This difference was also statistically significant, with an overall survival OR of 0.87 (95% CI, 0.77 to 0.98) (P = .024). Logistic regression model and Cox regression model showed that performance status and randomized treatment were the only two significant predictors of tumor response and survival. CONCLUSION It is concluded that the modulation of 5FU by MTX doubles the response rate to 5FU, and yields a small improvement in survival.

scholarly journals Target-Based Therapeutic Matching in Early-Phase Clinical Trials in Patients with Advanced Colorectal Cancer and PIK3CA Mutations

2013 ◽  
Vol 12 (12) ◽  
pp. 2857-2863 ◽  
Author(s):  
Prasanth Ganesan ◽  
Filip Janku ◽  
Aung Naing ◽  
David S. Hong ◽  
Apostolia M. Tsimberidou ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Clinical Trials ◽  
Early Phase ◽  
Advanced Colorectal Cancer ◽  
Pik3ca Mutations ◽  
Early Phase Clinical Trials

A Randomized Controlled Trial of Fluorouracil Plus Leucovorin, Irinotecan, and Oxaliplatin Combinations in Patients With Previously Untreated Metastatic Colorectal Cancer

2004 ◽  
Vol 22 (1) ◽  
pp. 23-30 ◽  
Author(s):  
Richard M. Goldberg ◽  
Daniel J. Sargent ◽  
Roscoe F. Morton ◽  
Charles S. Fuchs ◽  
Ramesh K. Ramanathan ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Metastatic Colorectal Cancer ◽  
Survival Time ◽  
Advanced Colorectal Cancer ◽  
Response Rate ◽  
Controlled Trial ◽  
Sensory Neuropathy ◽  
Time To Progression ◽  
Severe Nausea ◽  
End Points

Purpose Three agents with differing mechanisms of action are available for treatment of advanced colorectal cancer: fluorouracil, irinotecan, and oxaliplatin. In this study, we compared the activity and toxicity of three different two-drug combinations in patients with metastatic colorectal cancer who had not been treated previously for advanced disease. Patients and Methods Patients were concurrently randomly assigned to receive irinotecan and bolus fluorouracil plus leucovorin (IFL, control combination), oxaliplatin and infused fluorouracil plus leucovorin (FOLFOX), or irinotecan and oxaliplatin (IROX). The primary end point was time to progression, with secondary end points of response rate, survival time, and toxicity. Results A total of 795 patients were randomly assigned between May 1999 and April 2001. A median time to progression of 8.7 months, response rate of 45%, and median survival time of 19.5 months were observed for FOLFOX. These results were significantly superior to those observed for IFL for all end points (6.9 months, 31%, and 15.0 months, respectively) or for IROX (6.5 months, 35%, and 17.4 months, respectively) for time to progression and response. The FOLFOX regimen had significantly lower rates of severe nausea, vomiting, diarrhea, febrile neutropenia, and dehydration. Sensory neuropathy and neutropenia were more common with the regimens containing oxaliplatin. Conclusion The FOLFOX regimen of oxaliplatin and infused fluorouracil plus leucovorin was active and comparatively safe. It should be considered as a standard therapy for patients with advanced colorectal cancer.

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